增加农业生产的主要办法 Zengjia nongye shengchande zhuyao banfa Designer Designer unknown (未知) Date 1956, February Publisher Zhonghua quanguo kexue jishu puji xiehui (中华全国科学技术普及协会) Size 78x54 cm. Call nr. BG E15/794 Collection Landsberger collection Notes Theme First Five Year Plan (1953-1957)